The AKG P420 is a multi-pattern large-diaphragm condenser microphone for more demanding professional studio recording applications. Offering high sensitivity and 155dB maximum SPL, the P420 delivers a warm transparent sound quality ideally suited for ensemble recording, grand piano, woodwind and brass instruments as well as drums and percussion instruments. In addition, three selectable polar patterns – cardioid, omnidirectional or figure-eight – allow a wide range of stereo miking techniques and ambient recording.

A switchable bass cut filter and preattenuation pad enable the P420 to be used close to sound sources in sound fields as high as 155dB.

The microphone's chassis is made of precision-tooled zinc/aluminium alloy and boasts a dent resistant stainless-steel wire-mesh front grille. It comes complete with a spider-type shock mount in an aluminium carrying case.